Some of the most beautiful work of this craftsman, and many others, are in this book “Liège Gunmakers through their Work. 1800 - 1950”.
For more detail see: LIEGE GUNMAKERS
Meyers-Coune Henri
MEYERS-COUNE Henri arms manufacturer in Cheratte, in 1913 it deposits two patents in Belgium for an automatic pistol by gas deflagration combining the retreat in three places and with movement of opposite trigger as well as a new device applicable to the automatic weapons.
Your weapon is a gun of shooting of the Flobert type which has nothing to do with the patents above.
I forgot to say, your weapon: with Mexican trigger! Yes!
GG